Disposable diapers

Abstract

To prevent a part of excretions having missed an opening formed in a skin-contacting topsheet 14 of a disposable diaper from diffusively flowing over the top surface of this topsheet 14, the opening 16 is provided along the laterally opposite sides thereof with a pair of first flaps 17 opposed to and spaced from each other by a relatively small distance and a pair of second flaps 18 similarly opposed to and spaced from each other by a relatively large distance so that the part of excretions having missed the opening 16 defined by the laterally opposite side edges of the first flaps 17 may be reliably dammed by the second flaps 18 and thereby the diffusive flowing of excretion may be avoided.

What is claimed is: 
     
       1. A disposable diaper comprising: (a) a liquid-permeable first topsheet (11), a liquid-impermeable backsheet (12), and a liquid-absorbant core (13) sandwiched between said first topsheet (11) and said backsheet (12),   (b) a liquid-resistant second topsheet (14) overlying a large portion of said first topsheet (11), said second topsheet (14) comprising a pair of adjacent sheet members (14a, 14b) having facing inner sides and spaced apart outer sides, (1) the outer side of each sheet member (14a, 14b) being bonded to an outer side of said first topsheet (11),   (2) a portion of the facing inner sides of said sheet members (14a, 14b) being spaced apart from each other along a central zone of the diaper so as to form an opening (16) that allows access to said underlying first topsheet (11),   (3) the remaining portions of the facing inner sides of said sheet members (14a, 14b) being separably adhered to each other along longitudinal lines (23) extending outwardly from both ends of said opening (16),   (4) each sheet member (14a, 14b) consisting of a single continuous sheet of material that extends from an outer side of said diaper inwardly toward said opening (16) and in the area adjacent said opening (16) forms a single flap member extending above from said first topsheet (11), each flap member comprising a first flap section (17) located closest to the center of said opening (16) and a second flap section (18) located immediately adjacent said first flap section (17) and laterally outwardly therefrom, each first flap section (17) being only attached to a portion of each adjacent second flap section (18) and being unattached to said first topsheet (11), said flap members forming a pocket which extends under said flap members and above said first topsheet (11).     
     
     
       2. A diaper according to claim 1 wherein said remaining portions of the facing inner sides of said sheet members (14a, 14b) are adhered together along a longitudinal line in such a manner that they may be separated from each other without any rupture occurring in said sheet members (14a, 14b). 
     
     
       3. A diaper according to claim 1 wherein said first and second flap sections (17, 18) consist of folded over portions of the inner side portions of said sheet members (14a, 14b).